California earthquakes

M4.2 earthquake 21 km SSW of Three Rocks, California

A magnitude 4.2 earthquake struck 21 km SSW of Three Rocks, California on Mon, Oct 25, 1982, 4:12 PM PDT (23:12 UTC), 5 km (3 mi) below the surface.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 4.2 (ml), light
Local time: Mon, Oct 25, 1982, 4:12 PM PDT
UTC: 1982-10-25 23:12:16 UTC
Depth: 5.3 km (3.3 mi), shallow
Epicenter: 36.331° N, 120.508° W
Region: California
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.3 km horizontally, 0.6 km in depth
Depth from: From location
Station coverage gap: 147°
Stations used: 62

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 197.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1080804 (also filed as usp0001qh5, ci511907). Read Tue, Sep 22, 2026, 5:20 PM UTC.